﻿using System;
using System.Collections.Generic;
using System.Text;
using System.Runtime.InteropServices;
using System.Windows.Forms;

namespace SharpDiary.Core.Utility
{
    public static class Win32
    {
        /// <summary>
        /// 播放 *.wav 格式的文件。
        /// </summary>
        /// <param name="pszSound"></param>
        /// <param name="hMod"></param>
        /// <param name="sf"></param>
        /// <returns></returns>
        [DllImport("winmm.dll", SetLastError = true, CallingConvention = CallingConvention.Winapi)]
        public static extern bool PlaySound(string pszSound,
            IntPtr hMod, SoundFlags sf);

        [Flags]
        public enum SoundFlags : int
        {
            SND_SYNC = 0x0000,  /* play synchronously (default) */
            SND_ASYNC = 0x0001,  /* play asynchronously */
            SND_NODEFAULT = 0x0002,  /* silence (!default) if sound not found */
            SND_MEMORY = 0x0004,  /* pszSound points to a memory file */
            SND_LOOP = 0x0008,  /* loop the sound until next sndPlaySound */
            SND_NOSTOP = 0x0010,  /* don't stop any currently playing sound */
            SND_NOWAIT = 0x00002000, /* don't wait if the driver is busy */
            SND_ALIAS = 0x00010000, /* name is a registry alias */
            SND_ALIAS_ID = 0x00110000, /* alias is a predefined ID */
            SND_FILENAME = 0x00020000, /* name is file name */
            SND_RESOURCE = 0x00040004  /* name is resource name or atom */
        }

        /// <summary>
        /// 获取按键信息。
        /// </summary>
        public class KeyboardInfo
        {
            private KeyboardInfo() { }
            [DllImport("user32")]
            private static extern short GetKeyState(int vKey);
            public static KeyStateInfo GetKeyState(Keys key)
            {
                short keyState = GetKeyState((int)key);
                byte[] bits = BitConverter.GetBytes(keyState);
                bool toggled = bits[0] == 1, pressed = bits[1] == 1;
                return new KeyStateInfo(key, pressed, toggled);
            }
        }


        public struct KeyStateInfo
        {
            Keys _key;
            bool _isPressed,
                _isToggled;
            public KeyStateInfo(Keys key,
                            bool ispressed,
                            bool istoggled)
            {
                _key = key;
                _isPressed = ispressed;
                _isToggled = istoggled;
            }
            public static KeyStateInfo Default
            {
                get
                {
                    return new KeyStateInfo(Keys.None,
                                                false,
                                                false);
                }
            }
            public Keys Key
            {
                get { return _key; }
            }
            public bool IsPressed
            {
                get { return _isPressed; }
            }
            public bool IsToggled
            {
                get { return _isToggled; }
            }
        }

    }

}
